pectoral muscles

subclavius origin

1st costal cartilage

pectoralis major action

adducts and medially rotates arm

serratus anterior insertion

anterior medial border and inferior angle of scapula

pectoralis major origin

clavicle, sternum, 1-6 costal cartilage

pectoralis minor insertion

coracoid process of scapula

subclavius action

depresses and steadies clavicle

serratus anterior action

draws scapula around and forward

subclavius insertion

inferior surface of clavicle

pectoralis major insertion

lateral lip of intertubercular (bicipital) groove of humerus

serratus anterior innervation

long thoracic n

pectoralis minor innervation

medial pectoral n (C8/T1)

pectoralis major innervation

medial pectoral n (C8/T1) lateral pectoral n (C5/6/7)

subclavius innervation

nerve to subclavius (superior trunk of brachial plexus C5/6)

pectoralis minor action

pulls shoulder down and forward (protraction)

serratus anterior origin

ribs 1-8

pectoralis minor origin

ribs 3-5